Skill Topic · Cinematic

📘 MongoDB — Cursors & Sorting

Results ko control karo — sort, limit, skip, count, pagination! 📄

Topic 1

📌 1. Cursor Kya Hai?

💡

Ek baar me saare docs nahi aate

🔑

Batches me aate hain (default…

⚡

Next batches = 16 MB each

🎯

Cursor 10 minutes idle =…

Topic 2

📌 2. Cursor Basics

💡 `javascript // ═══ find() returns a Cursor ═══ const cursor = db.users.find({ isActive:…

Topic 3

📌 3. sort()

🎯 `javascript // ═══ Ascending (1) ═══ db.users.find().sort({ name: 1 }) // A → Z // ═══…

Topic 4

📌 4. limit() & skip()

⭐ `javascript // ═══ limit() — Maximum kitne docs ═══ db.users.find().limit(10) // Sirf 10…

Topic 5

📌 5. Execution Order

🔑 ` MongoDB cursor methods ka actual execution order: Code: find().sort().skip().limit()…

Topic 6

📌 6. count() & countDocuments()

✨ `javascript // ═══ countDocuments() — Accurate count (RECOMMENDED) ═══…

Topic 7

📌 7. Offset Pagination (skip/limit)

🌟 `javascript // ═══ Simple pagination ═══ function getPage(collection, filter, page,…

Topic 8

📌 8. Keyset Pagination (Cursor-Based)

🚀 `javascript // ═══ Better: Keyset / Cursor-based pagination ═══ // skip() ke bajaye last…

Topic 9

📌 9. Pagination Comparison

📚 ` ┌──────────────────┬──────────────────┬─────────────────────┐ │ │ Offset (skip) │…

Topic 10

📌 10. Tailable Cursors

💡 `javascript // ═══ Tailable cursor = Capped collection par live tail ═══ // Jaise "tail…

Topic 11

📌 11. Other Cursor Methods

🎯 `javascript // ═══ map() — Transform results ═══ db.users.find({}).map(doc => doc.name)…

Topic 12

📌 12. Cursor Chaining (Complete Example)

⭐ `javascript // ═══ Full pipeline ═══ const results = db.orders.find( { // Filter status:…

Topic 13

✅ Summary

🔑 KEY POINTS: - Cursor = pointer to results, batches me data aata hai - Execution order:…

Quick Quiz

Quiz — Question 1

📘 MongoDB — Cursors & Sorting ka sabse sahi definition kya hai?

Complete! 🎉

📘 MongoDB — Cursors & Sorting Complete!

Aliens School · HIEN · Cinematic Knowledge

✅